The Planning Board shall fix a time within 62 days from the date an application for site plan approval is made for a public hearing, unless the Planning Board decides such a hearing is unnecessary, and give public notice thereof by the publication in the official newspaper of such a hearing at least 10 days prior to the date thereof and shall decide the same within 62 days after such hearing or within 62 days after the application is filed if no hearing has been held; provided, however, that the time within which the Planning Board must render its decision may be extended by mutual consent of the applicant and the Planning Board. The applicant shall, at his or her own expense, mail notice of such hearing by certified mail, return receipt requested, at least 10 days prior to the date of the hearing, to all property owners situated within 100 feet of the boundaries of the site being reviewed. The property shall also be posted by the Village Code Enforcement Office at least seven days prior to the scheduled public hearing date.